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Why do you not want to answer this thread?(Your answer will be sent to Jeanette and Aytekin)

Yes, you should complete the email address before clicking the save button. Otherwise, you'll get that error. I've checked your form and I think you've figured this out already. I can see you have omitato.levis@gmail.com as one of the recipients.

So, you are saying that you cannot type @ character in the email address box? Are you using Safari or Chrome? Please confirm this. So far, I cannot replicate this using the same OS but it's through Browserstack so I really cannot tell.

JotForm Support

Answered by
Nik_C
on October 21, 2016 at 12:25 PM

I tested your form as well, I wasn't able to replicate this error with @ key, I'm on Mac OS X 10.12.Also, I see your second email in notifier:

The Italian language has a different command in Keyboard as far as my search result is concerned. You have to add the @ character by pressing CMD + ALT + O. Anyways, I think you've figured it out already. If you need further help, let us know here or create a new thread about it.